Home / 21,186.56-31,784.40-7,146.93

Finding the Fourth Proportional to 21,186.56, 31,784.40 and 7,146.93

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Solution

The fourth proportional to 21,186.56, 31,784.40 and 7,146.93 is: 10,721.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.56 : 31,784.40 = 7,146.93 : x
  2. Step 2: Convert to fraction form
    21,186.56/31,784.40 = 7,146.93/x
  3. Step 3: Cross multiply
    21,186.56x = 31,784.40 × 7,146.93
  4. Step 4: Simplify right side
    21,186.56x = 227,161,001.08
  5. Step 5: Solve for x
    x = 227,161,001.08/21,186.56
  6. Step 6: Final answer
    x = 10,721.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.